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CELERIAC (apium graveolens)

Requires six hours or more of strong, direct sun per day. Full Sun
Requires six hours or more
of strong, direct sun per day.
Requires two to six hours of direct sun per day. Part Shade
Requires two to six hours
of direct sun per day.


CELERIAC (apium graveolens)The Celeriac plant is a root crop and a member of the Celery family. It has a celery-like taste and is great in vegetable dishes. Growing Celeriac is worthwhile but can be difficult in colder climates.

The root bulb grows to four inches in diameter or more. Which is why Celeriac is sometimes called "knob celery". Most people know little, if anything, about Celeriac or it's cultivation. It is new to the home gardening community.

Growing Celeriac requires a long growing season, up to 200 days. That's the better part of a year! Due to this long growth season, very few gardeners try growing it. But, if you are willing to make this investment in time you will be rewarded with a great new veggie to put in stews and soups.

Planting Celeriac

Due to it's long growing cycle, Celeriac seeds need to be started indoors. You will not likely find seedlings at garden supply stores. However, they can be often acquired by conducting an Internet search. The seeds are very fine. Sprinkle them on the top of the soil in a pot or container and lightly water them in.

moonGROW Advice
If you choose to plant according to the phases of the moon Celeriac should be planted when the moon is in the3rd Quarter (i.e. waning) and in one of the following Zodiac Signs: Cancer, Scorpio, Pisces, Libra, Capricorn

Once they have germinated, thin the seedlings as you would any other broadcast sown seeds. Allow plenty of room between plants for ease of transplanting. After all danger of frost has passed it is time to introduce them to their new home in the garden. Celeriac is susceptible to frost in both the spring and fall.

Space seedlings four to six inches apart in rows 18 to 24 inches apart. Allow for the plants to have adequate breathing room and time to stabilize their growth. Then, maintain them with a regular schedule of care.

The care and feeding of Celeriac

While Celeriac is slow growing, it does not take as much care as it's cousin Celery. Grow Celeriac plants in rich soil and full sun. Make sure to keep plants well watered. Fertilize once a month with a general purpose fertilizer. Celeriac does not require blanching. Days to Maturity: Approximately 200.

Kitchen Tip:
Celeriac stores as easily as carrots. It will store for 6-8 months at 98-100% relative humidity and at a temperature of 32F (0 C). Celeriac adds a fresh celery flavor to soups, stews, roasts and fresh salads.

Insects and pests

Slugs, Carrot Flies and Celery flies can infest Celeriac. Organic Insect Control is the most effective method of controlling these threats.

Harvesting Celeriac

Harvest the small bulbs as they reach a couple inches in diameter, thinning as you harvest. They can grow up to 4 inches in diameter or more. The smaller bulbs will naturally be more tender. If kept in a cool place, Celeriac will keep for several weeks.

Spring Gardening
Copyright© 2016 Gene DeFazzio
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